Door-latch



ModeL) F. J. LEE.

DOOR LATCH. No. 286,935. V Patented Oct. 16, 1883.

PATENT Erica.

DOOR-LATCH.

SPECIFICATION forming part of Letters Patent No. 286,935, dated October16, 1883,

Applicationfiled Muy18,1853. (Modeh) To all whom it may concern.-

Be it known that I, FREDERICK J. LEE, of Oswego, in the county ofLabette and State of Kansas, have invented certain new and usefulImprovementsin Door-Latches; and I do hereby declare that the followingis a full, clear, and

. exact description thereof, reference being had two positions by theaid of full lines and dotted lines. Fig. .5 is a detail view of amodification.

This invention relates to novel improvements in a faceplate having alooped guard, in combination with a slotted lever, which is adjustableover or beneath the shank of the latch, for the purpose of lockingiteither up or down, all of which will be fully understood from thefollowing description, when taken in 1 connection with the annexeddrawings.

The

combined latch and lock which I am about to describe is an improvementon the devices which are described and claimedin my Letters Patentnumbered, respectively, 250,551, of 1881, and 260,693, of 1882. V

A designates part of a door-frame having a vertical beveled stripsecured to it, to which isfastened a wearing catch-plate, a; and Bdesignates part of a door to which my improved device is applied. 011the inner side of the door, at a suitable point, I rigidly secure aface-plate, 0, having aslot, I), through it, which registers with acorresponding slot through the door, and also through abearingplate, D,secured to the outside of the door. The plate 0 is formed with a loopedguard, c, for the lockor axis of motion of the latch. thus applied'isnot only active, but 1t is G designates a lever-latch, which isconstructed with a hooked inner end, (shown at h.) for the purpose ofengaging with the wearing-plate a. It is also constructed with athumb-piece, i, a fulcrum-notch, j, aseginent, 7c, and a notched lug, Z.The notch j engages with the edge of the slot through the bearingplateD, which edge afi'ords the fulcrum for the latch G. The segment k, whichis formed on the shank of the latch opposite the notchj, is designed toprevent displacement of the latch from plate D, and the notched lug l isdesigned for holding one end of a helical spring, S, the opposite end ofwhich is held by a similar notched lug, Z, which is formed on the backof the bearing-plate D, as shown in thesectional view, Fig. 3. I

It will be observed that when the spring S is in its place it assumesthe form of the are ofa circle which is concentric to the fulcrum Thespring securely held in place, and by this mode of applying it aspring-box or a large mortise in the door is rendered unnecessary.

When it is desired to lock the door, the tongue (I of the locking-leverE is adjusted over the shankof the latch. "When it is de sired to renderthe latch inactive, the tongue (I is adjusted beneath the shank of thelatch, and when it is desired to release the latch the locking-lever Eis drawn back, so that the tongue (I does not engage with the shank ofthe latch. These three adjustments are allowed by providing thelocking-lever with the T-shaped slot e.

It will be observed that Ihave arranged below the locking-lever athun1b-picce, T, or fulcrum, which may be a knob or ahook adapted toafford a ,purchase for the thumb when it is desired to lift the latch bysaid locking-lever;

It is obviousthatthelocking-lever may have more than one notch springingfrom its longitudinal slot, and that the handle or lip Z may form anintegral part of this lever, or be a separate piece secured to it in anysuitable manner. I may use a spring in combination with the drop-latch,if desired. I do not confine myself thereto. 4

Having thus fully described my invention,

what I claim as new and desire to secure by In testimony that I claimthe foregoing as Letters Patent, is my own I affix my signature inpresence of The c0n1binati0n,with alever-latch, 0f aslottwo witnesses.ted face-plate, a loop or guard, c, and a locking- FREDERICK J. LEE. 5lever constructed with longitudinal and trans- Vitnesses:

verse slots, substantially in the manner and VVM. HOUOK, for thepurposes described.

D. V. SHIRLEY

